When you ask "What number is halfway between 11 and 73?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=73.
To find the number halfway between 11 and 73, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 73 into our formula, we get:
(11 + 73)/2 = 42
Thus, the number halfway between 11 and 73 is 42.
To check that our answer is correct, we subtract 11 from 42 and subtract 42 from 73 and compare the two numbers:
42 - 11 = 31
73 - 42 = 31
As you can see, the halfway number is 31 higher than 11 and 31 lower than 73. Therefore, our halfway between answer of 42 above is correct.
Halfway Between
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Halfway Between 11 and 74
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